Apparatus for casting printers&#39; leads.



1. s'. BANCROFT & M. c. INDAHL. APPARATUS FOR CASTING PRINTERS LEADS.

APPLICATION FILED OCT. 6, 1914.

1,220,055. Patented M31120, 1917.

4 SHEETS-SHEET l.

J. s. BANCROFT & M. c. INDAHL. APPARATUS FOR CASTING PRINTERS' LEADS.

APPLICATION FILED OCT- 6.1914.

Patented Mar. 20

1917. 4 SHEETS SHEET 2.

fIM M W 2-:- SUM-"a s I. s. BANCROFT & M. c. INDAHL.

APPARATUS FOR CASTING PRINTERS LEADS.

APPLICATION FILED OCT.6, I914.

Patented Mar. 20, 1917.

4 SHEETSSHEET 3- awve'ntov 40am. W s

witmwaw J. S. BANCRUFT 61 M. C. INDAHL.

APPARATUS FOR CASTING PRINTERS LEADS.

APPLICATION FILED OCT. 6. 1914.

1,220,055. v Patentod Mar. 20, 1917.

4 SHEETS-SHEET 4.

Wa n: 5mm

x9 7 79 M 5 2 3 W W UNITED STATES PATENT OFFICE.

JOHN SELLERS BANCROF'I AND MAURI'I'Z C. INIDAHL, DIP PHILADELPHIA, PENNSYL- VANIA, ASSIGNORS TO LANS'ION MONOTYPE MACHINE COMPANY, OF PHILADEL- -PHIA, PENNSYLVANIA, A CORPORATION OF VIRGINIA.

APPARATUS FOR CASTING PRINTERS LEADS.

Specification of Letters Patent.

Patented Mar. 20, 1917.

Application filed October 6, 1914; Serial N 0. 865,340.

To all whom it may copcem:

Be it known that we, J OHN SELLERS BAN- CROFT and MAURITZ C. INDAHL, citizens of the United States, residing at Philadelphia,

in the county of Philadelphia and State of Pennsylvania, have invented certain new- This invention relates to molds and molding apparatus for casting elements for use in printing forms, and while features of the invention are competent for use in connection ,with molds for casting various elements such as printers leads, rules, etc., it has been. particularly designed for use in the casting of printers leads. v

One of the objects of this invention is to produce a lead mold competent for use with ,a monotype casting machine of the standard type now in common use, or as illustrated,"

for example, in United States Patent No. 625,998, granted to J. S. Bancroft, May 30, 1899, and to make it practical for printers equipped with a monotype casting machine to cast their own leads of the desired point size to suit the work in hand.

\Vhile the above object has been sought and attained, it will be understood that the mold embodies features of construction competent for and capable of use with an operating mechanism which does not necessarily embody the refinements of the monotype casting machine, especially with respect to the mechanism for casting justifying characters and assembling the characters in proper relation for printing purposes.

In the drawings illustrating the inven tion,

Figure 1 is a top plan view of a portion of .a monotype machine, parts being broken away and many parts removed where the same would interfere with the mechanism of the present invention or be unnecessarynecessary for a clear understanding of the same, parts of the mechanism shown in this drawing being broken away.

Fig. 3 is a top plan view of the complete mold and parts immediately associated therewith removed from the machine.

Fig. 4 is. an elevation looking at the left hand end of the mold (bottom of Fig. 3).

Fig. 5 is an elevation looking at the front of the mold (right hand side Fig. 3) with the front Wall and cross block removed.

Fig. 6 is an elevation looking at theright hand end of the mold (top of Fig. 3).

Fig. 7 is a. front elevation of the cross block;

gig. 8 is an end elevation of the same; an

be understood, Figs. 1 and 2 illustrate the frame A of the monotype machine and a portion B of the galley. These views also show the usual rod 122 of the patent hereinbefore referred to, which is connected with the mold blade and its actuating bell crank lever 128 connected by a rod 129 to the lever extending down to the operating cams. There is also seen in these views the pusher or ejector 259 of the patent hereinbefore referred to with its operating bell crank and connection, as well as the usual centering pin actuating lever 58 which is pivotally mounted on an upwardly extending bracket of the frame, and is adapted to be oscillated in time with the casting operation, not for the purpose of actuating the centering pin, but for the purpose of clamping the mold sections and again releasing the pressure thereon when the casting is to be advanced.

The mold of the present invention which is shown in detail in Figs. 5 to. 9, embodies many characteristics of the mold of the said patent and of the standard machine now found on the market. The mold is adapted to receive molten metal under pressure from -a nozzle which metal is guided into the mold cavity through a jet opening in a cross block. The casting when sufficiently parts, and in order that the relation may congealed is pushed from the mold cavity by the mold blade and transferred into a stacker whiehin a measure corresponds to the line forming mechanism of the standard machine, but in the present device the mold is intended for the formation of printers leads and is therefore of considerable superat the end or bottom of the mold cavity, and

this cavity extends vertically a distance much greater than the height of a mold cavity for casting type, or to such height as maybe desired or necessary for forming a lead of the required length.

Referring particularly to Fig. 3 which is a top plan view of the mold, the reference numeral 1 indicates the mold frame which embodies essei'itially a Vertical portion with forwardly projecting top and bottom portions within which the cavity or casting chamber defining elements are mounted. Vvorking through the rear of the frame and guided in suitable ways therein, is a mold blade base-2 having at its forward end a vertically elongated and rather wide mold blade 3 best seen in dotted lines in- Fig. 4. This mold blade is of a thickness not greater than the thinnest point size lead to be cast in the mold, and its forward edge serves to define one edge or a portion of one edge wall; thus, where a lead only equals in thickness the thickness of the mold blade, the mold blade constitutes the complete edge wall of the cavity, but should the lead be of greater thickness'or of greater point size than the thickness of the blade, the said blade constitutes a portion only of such edge wall, the remaining portion of the edge wall being formed by a filler block l, shown in dotted lines in Fig. 3 against which the side of the mold blade works.

The side walls of the mold cavity are formed by type blocks 5 and 6, the former mounted in the frame 1 in front of the filler block 4 and being of a thickness corresponding to the. width of the lead to be cast and its position for determining the thickness or point size of the lead is regulated by the introduction of point blocks 7 between its rear face and the right hand end plate 8, as shown in top plan and front elevation in Figs. 3 and 5, respectively.' The type block 6 is located on the opposite side of the mold cavity from the type block 5, and is prefportion of the type block on the mold cavity .side of the apertures extends forwardly between the top and bottom portions of the frame and is free to advance or recede under pressure applied from the rear or outer side, whereby the mold cavity face of the block will be maintained in a proper plane, but is capable of advancing slightly when pressure is applied to the center of the outer face of the block, asfor example, through 1 the operation of a pressure screw 11 mounted in a threaded sleeve 12 carried by a fixed L arm 18.secured to the frame by screws 14.

The portions of the block 6 in rear of the apertures 10 form extensions at top and bottom which will yield very slightly when the-pressure of the screw*11 is applied and these extensions form the supports through which the block is connected with the frame by means of the screws 9. v i Y The type block 6 besides forming a side wall of the cavity serves as the support for a filler blade 1%. For this purpose it is extended above the top of the frame 1 and provided with an angle iron abutment 13 against which one edge of the filler blade 12 may be positioned, and said blade is clamped in place by an angle iron clamp 14.

adapted to be fixed'to the type block byscrews 15. The position of the filler blade is such that it fits in and forms the upper end wall of the mold cavity between the proximate faces of the type blocks, and with the arrangement shown it is obvious that the filler blade maybe adjusted vertically for the formation of leads of greater or less length as may be desired, a mold blade of a length corresponding to the. length of the lead being, of course, employed in connection therewith.

Mounted to slide between the top and bot- 7 tom projections of the frame, and on the inner side of a front plate 16 secured to the frame, is a cross block 17 which, in so far as the jet opening, jet dischargers, etc., are concerned, corresponds closely to the cross blade of the present standard monotype ma- 21, Fig. 5, for throwing off the jet when discharged by the forward movement of the jet pusher when the cross block advances toward the right, in Fig. 5.

' The pump nozzle; is adapted to cooperate the mold blade, the carrier and cross blocks are formed as an integral structure, there being for this purpose a suitable vertically elongated opening 23 formed in the cross block. At the bottom' of the opening are the usual grooves 24 found in the type carrier of the standard machine, and to hold the leads in position in the opening 23, spring fingers 25 are mounted on the 0mm block in position to bear against the ridges between the grooves 24 so as toclamp the leads in position in the opening 23 during the rearward movement of the cross block which carries the leads from the mold cavity into a position to be discharged from the cross block by the standard pusher 259 before referred to.

The cross block is held in position and guided in the frame by a front plate 16, hereinbefore referred to, and in order to clamp the cross block firmly against the type blocks during the casting operation, a pressure screw 26 is mounted in a threaded sleeve 27 in the front plate and is operated from the actuating lever 58, to periodically clamp the'cross block firmly in position, and to release the same when it is to be moved forwardly for the discharge of the jet and reception of the lead and rear-wardly to bring the lead into position for being pushed from the cross block into the type channel by which it is conveyed to the stacking arrangement.

The cross block 17 is pivotally connected with an operating rod 28 receiving its motion from the operating cams as does the type carrier and cross block operating rod of the standard monotype machine, and -machine of thepatent before referred to, said rod 28 being provided with springs 29 and 30 forming buffers for cooperation with a fixed stop 31 to bring the parts to rest without undue shock. Said spring 30 alsoserves to maintain a sliding sleeve 32 in position on the rod for properly cooperating with the end of a long lever 33 pivoted at 34 on the galley frame for pushin the leads from the point where they are discharged from the channel 35 into a box 36 in which they are lstacked. The lever 33 is provided with a projection or pusher head 3'? normally occupying the position shown in Fig. 1 with its face parallel with the outer face of the channel 35; thus, a lead advancing through the channeland into position against the face of the pusher 37 will by the next movement of the lever 33 be moved transversely of the channel and into the box 36 where it may rest against a suitable inclined support or againstthe leads previously deposited in the box. The whole body of leads may be removed from the box by hand and utilized in the ordinary way.

For operating the premure screws 11 and '26, said screws are provided with crank arms 38 and .39, respectively, and connecting rods 40 and 41 extend .upwardly fromthe crank arms and are loosely connected withthe actuating lever 58.

Conveniently the actuating lever as ordinarily constructed is provided with acasting 42 adapted to fit the pin 43 on the lever 58 and to be clamped to said lever by thumb nuts and screws 44 arranged in position to cooperate with parts of the lever as shown clearly in Figs. 1 and 2. Brackets 45 on the casting 42 form eyes or sleeves through which the upper ends of the connecting rods 40 and 41 project, said rods being provided above said sleeves with adjustable shoulders or nuts 46 serving to lift the rods and turn the pressure screws in a direction to release the pressure on the type and cross blocks respectively. Downward-pressure is transmitted to the crank arms on the pressure screws through springs 47 surrounding the connecting rods, and the tension of these springs is so regulated as to impart to the pressure screws a movement suflicient to give the required clamping action to the parts,

and at the same time the lever 58 is permitted to operate throughout the full range of its movement without imparting undue strain on its operating connections, which latter are, in every respect, similar tothe standard monotype machine orthe machine of the patent referred to.

Inasmuch as the movement of the mold blade in discharging leads must be somewhat greater than the movement of the mold blade 'in discharging type of the. largest dimension ordinarily cast in machines of this character, provision should be made for imparting an increased range of movement to the blade, and this is preferably accomplished by interposing a compound lever between the rods 122 and 129, as a substitute for or in addition to the ordinary bell crank lever 128. The preferred form of compound lever is illustrated in Fig. 1, from which figure it will be seen that the bell crank lever 128 carries a second lever 130 pivotally mounted at an intermediate point in its length on one arm of the bell crank lever. One end of the lever 130 cooperates with the usual collars on the rod 122 at 131, while the opposite end of the lever 130 is provided with a straight guideway 132 in which works one end of a short lever 133 pivotally mounted at an intermediate point on an extension 134 of the bell crank lever 128 while its outer end cooperates with fixed adjustable stops 135. The lever 130 is provided with a large opening 136 for the pivot or bearing of the bell crank lever 128 to permit of the independent movement of the lever, and the short-lever 133 is so proportioned that when the bell crank lever 128 is swung on its pivot an additional movement will be imparted to the lever 130 in the same direction.

Should it-be desired to operate the machine withoiit imparting the increased movement to the mold blade, this is accomplished by reversing the position of the short lever 133, the two arms or ends of the latter being so proportioned with respect to the center, that when the lever is in one position the increased movement will be imparted to the mold blade, and when the lever is reversed end .for end, the ordinary normal movement will be imparted to the mold blade.

The whole mechanism is designed for the specific purpose of casting large elements for printing forms, such as leads and rules, in connection with the standard equipment of a monotype machine, Without requiring alteration of the latter other than the removal of certain parts and the substitution of the parts comprising the present invention, but at the same time it will be at once apparent to those skilled in the art that the mold itself is susceptible of use in operation with any competent mechanism for periodically operating the mold blade, cross block, and pressure screws, and therefore the mold may constitute a separate article of manufacture which may be supplied to establishments equipped with monotype casting machines or other machines adapted for the use of the mold.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States, is:

1. In a mold adapted to be removably mounted in a casting machine, the combination with a frame, type blocks mounted in said frame and a mold blade movable between the proximate faces of said type blocks and adapted to form an edge wall of the mold cavity, of a pressure screw held by the frame and cooperating with one of the type blocks for advancing the same during the casting operation and releasing the same during the forward movement of the mold' blade to discharge the casting."

2. In a mold adapted to be removably mounted in a casting machine, the combination with the frame, type blocks mounted in said frame, mold blade, movable between the proximate faces of the type blocks and forming an edge wall of the moldv cavity, and cross block forming the edge Wall of the mold cavity opposite the mold blade, of a pressure screw carried by the frame, and cooperating with one of the type blocks for reducing the thickness of the mold cavity during the casting operation and for releasing the pressure on the type block during the forward movement of the mold blade to discharge the casting from the mold cavity.

3. A mold adapted to beremovably mounted in a casting machine embodying a mold frame, a mold blade mounted to reciprocate therein, a cross block mounted to reciprocate in the frame in a plane substantially at right angles to the plane of movement of the mold blade, a type block, and a filler block mounted in the frame at one side of the path of movement of the mold blade, said filler block and mold blade being adapted to form one edge wall of the mold cavity, a type block mounted in position to form the side wall of the mold cavity opposite that formed by the first mentioned type block, and means for intermittently clamping said type blocks during the casting operation, and for releasing said type blocks during the movement of the parts for discharging the casting from the mold cavity.

4. A mold of the type specified embodying'a type block and a filler block located on one side of the plane of the mold cavity and adapted to form respectively aside and edge wall of said cavity, a type block forming the opposite side wall of the mold cavity, a mold blade mounted to reciprocate between the last mentioned type block, fillerblock and first mentioned type block, where- 1 by a mold blade of given thickness may serve to discharge castings of varying thicknesses, and a cross block forming the edge wall of the mold opposite that formed by the mold blade and filler block.

5. A mold adapted to be. removably mounted in a casting machine and embodying a casting chamber having an edge wall formed by a movable mold blade, and one side wall movable toward and from the plane of movement of the mold blade with means whereby said side Wall may be periodically advanced and retracted for reducing the thickness of the casting chamber during the casting operation.

6. A mold adapted to be removably mounted in a casting machine and embodying a frame, type blocks forming the side walls of the casting chamber, a mold blade forming an edge wall of said chamber,a cross block forming the edge wall of the chamber opposite the mold blade, and means for simultaneously clamping the type blocks toward each other and the cross block against the,

side of the type blocks and for simultaneously releasing the same.

7. A mold of the character specified embodying a frame, type blocks mounted in said frame in position to form the side walls of the casting chamber, a mold blade forming an edge wall of the casting chambet, a cross block forming the opposite wall of the casting chamber, and pressure screws coiiperating with one type block and the cross block respectively.

8. A mold of the character specified embodying a frame, type blocks mounted in said frame in position to form the side walls of the casting chamber, a mold blade forming an edge wall of the casting chamber, a cross block mounted in said frame to reciprocate in a plane at right angles to the plane of the mold blade, and pressure screws mounted in the frame and cooperating with one of the type blocks and cross block respectively.

9. A mold of the -character specified embodying a type block forming one wall of the casting chamber, and provided with yielding supporting'extensions whereby the face of the block may be advanced to reduce the thickness of the casting chamber,v

and a pressure screw cooperating with the said block.

10. A mold of the character specified embodying a frame, an adjustable type block mounted in said frame and forming one wall of the mold cavity, a yielding type block forming the opposite wall of the mold cavity, a mold blade movable between said type blocks, and a pressure screw cooperating with the yielding type block.

11. A yielding type block for molds of the character specified formed with end extensions constituting supporting portions and an intermediate, forwardly extending portion adapted to form one side wall of the mold cavity, there being apertures through the type block at the base of the end eX- tensions, whereby the block may be caused to yield for advancing the side wall of the mold cavity by pressure applied to the outer face of the block;

12. In a casting apparatus for elements of printing forms, the combination with a mold embodying a mold blade and cross block, of a mold blade operating mechanism embodying a bell crank lever, a second lever pivotally mounted on one arm -of said bell crank lever, and a third lever pivotally mounted on an extension of said bell crank ,lever and cooper ating with said second lever, and with a fixed stop for imparting an increased range of movement to'the mold blade.

13. In a castingapparatus for forming elements of printing forms, the combination with a mold embodying a mold blade and type'blocks, of a reciprocatory actuating lever, a pressure screw for clamping the type blocks, and yielding connections intermediate the actuating lever and pressure screw, whereby the type blocks may be clamped.

14. A mold for casting printers leads, embodying type blocks having smooth proximate faces forming the walls of the mold cavity for determining the point size 'of the lead, a mold blade working between said blocks and forming one longitudinal edge Wall of the cavity, a transversely movable block seating against-the blocks to form the edge wall of the cavity opposite the blade, and a filler blade filling the space between the blocks to form an end wall of the cavity and determine the set size of the lead; I

15. A mold for casting printers leads embodying a mold base having an opening for the molten metal supply nozzle, type blocks mounted on said base and extending vertically with relation to said opening a distance greater than the set size of the lead and forming the side Walls of the mold cavity, a mold blade working between the blocks and forming one edge wall and a transversely movable cross block. forming the opposite edge wall of the cavity, and a vertically adjustable filler blade closing the top of the cavity and forming the wall determining the set size of the lead.

JOHN SELLERS BANOROFT. MAURITZ C. INDAHL.

Witnesses:

SAMUEL R. DAVIS, H. G. Hoovna. 

